When dealing with a diverse nation of over 330 million people living in more than 140 million housing units, the challenges of conducting a census can be quite complex. Our goal is to conduct a complete and accurate census – but, before we can do that, we need to establish where to count. We need to make sure we have a list of all the correct addresses to ensure that everyone living in the United States is invited to participate in the census and is counted in the correct location.